You're maybe looking for something like this?

use strict;
use warnings;

sub analyse_user_inputs {
    my $hash_ref = shift @_;
    my @the_inputs;

    foreach ( keys %{$hash_ref} ) {
        push @the_inputs, $_;
        if (ref $hash_ref->{$_} eq 'HASH') {
            push @the_inputs, @{ analyse_user_inputs($hash_ref->{$_}) 
+};
        }
        elsif (ref $hash_ref->{$_} eq 'ARRAY') {
            foreach my $array_element (@{$hash_ref->{$_}}){
                push @the_inputs, @{ analyse_user_inputs($array_elemen
+t) };
            }
        }
    }
    
    return(\@the_inputs);
}

my $data = {
    foo => 1,
    bar => [
        {
            xyzzy => 'magic',
        }
    ],
    baz => {
        quux => 123,
    }
};

use Data::Dumper;
print Dumper(analyse_user_inputs($data));

[download]

No need to play funny tricks with variable scoping. Just take the results of your recursive calls and push them onto @the_inputs.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re: subroutine memory variable scope by tobyink
in thread subroutine memory variable scope by austinj

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